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If you can route a shorter belt and do away with the smog pump altogether I would go with that. Otherwise the pumps usually have the main housing with a cover plate bolted to it. You need to get access to the inside of the pump, remove the internals, so that it is not pumping all time.
A missing or inoperative check valve also causes a pump to continue to run. The check valve prevents water from draining back into the sump from the discharge line. If it is not operating correctly, the cycling of water never allows the sump to empty, even though the pump runs without stopping.